@misc{PMFA_1957_2_1_a14,
     title = {Seismicky aktivni oblast v {Arktid\v{e}} [mapa]},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {135},
     year = {1957},
     volume = {2},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1957_2_1_a14/}
}